Robert Downey Jr. Captain America birthday party (photo!)

Happy 49th birthday, Robert Downey, Jr.!

The dad of two celebrated his big day Friday. And, it looks like he's come a long way from his old partying days!

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Since his birthday fell on the same day as the premiere of his buddy Chris Evans's Captain America: The Winter Soldier, Robert threw together his own screening of the flick and invited a bunch of kids and their parents.

"What better way to spend my birthday than recognizing the cosmic miracle of Captain America 2 opening the same day?" he posted on his Facebook page. "Gonna wrangle about twenty kids to watch it with and partaaaaaaaaaaaaay Marvel-style!!!"

Robert is so awesome, he shared a live pic of the event on his Facebook page, captioning it, "Let the partaaaaay begin!!!"

Ummm, love!?! Those are some lucky, lucky kids. And Robert seems quite happy with his coolest-ever soirée!

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Robert is dad to sons Exton, 2, and Indio, 20.

I know we loved him already, but how adorable is he now for doing this?

Love! xo Haley-O Celebrity Candy: Follow along as Haley Overland delivers the latest scoop on celebrity families—plus sweet celeb interviews! You can’t have too much of this candy, so check back often.